.f {
    position: relative;
    margin: 300px;

    .s {
        position        : absolute;
        width           : 100px;
        height          : 100px;
        transform-origin: -100% center;
        border-radius   : 100%;
        @for $i from 1 through 12{
            &:nth-child(#{$i}){
                background-color: hsla($i*30,50%,50%,.8);
                transform: translate(100px) rotate($i*30deg);
            }
        }
    }
}